The paper concentrates on enhancing the efficiency of BLDC motors used in the automobiles, robotics, and aerospace fields among others through improving the Torque-Weight ratio. This work also explains the logical application of the Halbach array, a specific configuration of permanent magnets, whereby the magnetic fields are focused on one side and erased on the other side. This setup leads to the loss of weight of the motor by almost half its weight without any loss in generation of torque which in turn increases the power density and efficiency of the energy produced. Moreover, the motor control system is improved through the use of Selective Harmonic Elimination (SHE) with a Pulse Width Modulation (PWM). With harmonic distortion that causes losses and roughness in motor operation, particular lower-order harmonics, which often reduce motor efficiency, are accurately canceled out. In the application of PWM, the SHE technique is employed in the dimensioning of the switching sequence and to activate the motor with reduced vibrations, low noise, as well as high reliability. This research applies superior electromagnetic design methods and optimum control schemes for enhanced motor performance. The torque-to-weight ratio, alongside better control, makes this BLDC motor configuration well-suited to applications with high power density, higher precision and low-weight systems. In addition, it also has an implication in further advancement of electric motor technologies that entail the utilization of less material while achieving better efficiency, or not compromising on the efficiency when the use of material is limited. This work opens up possibilities for new types of electric motors and thus contributes to the further development of sustainable and high-performance electric mobility.